Finding the Third Proportional to 500,128 and 1,179,870

Step by Step Solution

1. Step 1: Write the proportion equation
   500,128 : 1,179,870 = 1,179,870 : x
2. Step 2: Convert to fraction form
   500,128/1,179,870 = 1,179,870/x
3. Step 3: Cross multiply
   500,128x = 1,179,870 × 1,179,870
4. Step 4: Simplify right side
   500,128x = 1,392,093,216,900
5. Step 5: Solve for x
   x = 1,392,093,216,900/500,128
6. Step 6: Final answer
   x = 2,783,473.86